Oiler.



R. G. McDOWELL.

OILER. I APPLICATION FILED JULY 12, 1911 1 1 19,522., PatentedDec.1,1914

- shown to illustrate the location of the oiler UNITED STATES ROBERTGEORGE MCDOWELL, OF WALKERVILLE, MONTANA, ASSIGNOR TO INGERSOLL- RANDCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

OILEB.

Specification of Letters Patent.

Patented Dec. 1 1914 Application filed July 12, 1911. Serial No.638,101.

resident of lValkerville, in the county of Silver Bow and State ofMontana, have invented a new and useful Improvement in Oilers, of whichthe following is a specification.

This invention relates to oilers for direct acting engines, such, forinstance, as rock drills, and it has for its object to provide means forfeeding oil in very small quantities to the pressure fluid supply forthe engine, said feeding means being controlled by vibrations due to theoperation of the engine.

A practical embodiment of the invention is represented intheaccompanying drawings, in which,

Figure 1 represents the oiler in top plan, Fig. 2 is a front view 'ofthe same, Fig. 3 is a section taken in the plane of the line A-A of Fig.1, a portion of a rock drill being and its other branch 8 adapted toreceive the casing 9 of the oiler. This casing 9 serves as a reservoirfor the oil and it is provided at its outer end with a removable fillingcap 10. The inner end of the casing 9 projects into the T-coupling 3 andis preferably tapered so as to give a greater amount of space within thecoupling for the passage of the pressure fluid through the coupling. Ahollow valve 11 has its hollow stem 12 projecting axially into the oilercasing 9, to

a point adjacent to the outer end ofv the casing. A'seat 13 for thevalve 11 is provided at the inner end of the casing, the bore oat,

the casing having a cylindrical reduced por-. tion 14 leading inwardlyfrom the valve seat 13 to a slightly enlarged cylindrical portion 15,said enlarged cylindrical portion 15 opening into the oil chamber 16. Avalvev seat 17 is provided where the chamber 16 communicates with theportion 15 of the bore and a normally open auxiliary valve18 drillcylinder is denoted by 1,v

is provided on the hollow valve stem 12 in I position to limit theopening movement of the valve 11 and close communication from the oilchamber 16.. A nut 19 looks the valve 18 in position. Acoil spring 20 isinterposed between the valve 18 and the interior annular shoulder 21 atthe juncture of the portions 14 and 15 of the bore of the casing,

which spring serves to hold the valve 11 normally closed and the valve18 normally open. from the. oil chamber 16 to the valve seat 13, H1 thepresent instance, by flattening thesides of the valve stem as shown at22.

Proceeding to describe the operation of the oiler: The hollow valve lland valve stem 12 permit the pressure fluid to pass therethrough andexert its pressure on the top of the oil within the chamber 16. When theengine is in operation, the vibrations of the engine will shake thevalve stem 12. sufliclently to open the valve 11 slightlv and thuspermit the oil to pass therethrough in small quantities but uniformly,intothe pressure fluid supply passing to the engine. This is readilyaccomplished by reason of the long valve stem which is readily vibratedby Open communication is establishedthe vibrations of the engine, theclosing spring 20 for the valve 11 being adjusted to the requiredtension to permit more or less quantities of oil to pass through thevalve 11, the Weaker the tension of the spring 20, the more freely willthe oil pass through the valve 11. The auxiliary valve 18 limits theopening movement of the oil distributing valve 11 and also closes theinner end of the oil chamber 16 when the valve 11 is at the limit of itsmovement away from its seat 13. This oiler can be used in any positionfrom vertical to horizontal.

While I have shown this oiler in connec tion with a rock drill, it is tobe understood that I do not wish to limit myself to the particularapplication shown and described herein but contemplate its use inconnection with the pressure fluid supply for engines of variouscharacters.

What I claim is:

1. In an oiler for pressure fluid operated tools having a fluid supplypipe, a closed oil reservoir having an oil supply passage leading tosaid fluid supply pipe, a hollow valve for said passage having a hollowvalve stem afiording communication between said fluid supply pipe andsaid oil reservoir and a spring for resiliently elosing said valve, thesaid sprinQbeing of slight tension to permit the opening out said valvefrom the vibration of said tool.

2. In an oiler for pressure fluid operated tools having a fluid supplypipe, a closed oil reservoir having an oil supply passage leading tosaid fluid supply pipe, a hollow valve for said passage having" a hollowvalve stem afiording communication between said fluid supply pipe andsaid oil reservoir a spring for resiliently closing said valve, the saidspring being of slight tension to permit Liiaeaa the opening of saidvalve from the vibration of said tool, and an auxiliary valve on saidvalve stem for limiting the opening movev ment of the first named valveand closing the said passage.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two Witnesses, this twenty eighth day of June,1911.

ROBERT GEORGE MCDOWELL.

Witnesses:

A. S. UHLER, H. G. HOPKINS.

